C C++课程设计 选题管理系统

课程设计选题管理系统作者:admin 日期:2008-05-23/*设计学生类；课程设计题目类（序号，题目，人数，描述）；每个题目限两个人选；要求使用面向对象编程进行模拟课程设计选题；要求以链表格式存储，信息保存在文件中。

主要包括下列模块：1．新增、修改、删除课程设计题目；2．新增、修改、删除学生信息；3．查询课程设计内容；4．课程设计选题；*/#include <iostream>#include <string>#include <iomanip>using namespace std;class Student{long num;char name[20];char subject[30];Student *Next;Student *Head;public:int Creat(){FILE *fp;Head = NULL; //存放链表的起始地址Student *p, *pEnd;p = new Student; //创建一个Teacher的动态对象if((fp=fopen("Student.txt","r"))==NULL){cout << "can not open file!" << endl;exit(0);}fscanf(fp,"%ld%s%s",&p->num,p->name,p->subject); //输入指针p指向的对象的数据成员的值pEnd = Head; // 存放当前对象的地址while(!feof(fp)){ // 0 是输入结束的标志if(NULL == Head)Head = p; // 只在第一次执行此语句elsepEnd->Next = p; // 存放下一个对象的地址pEnd = p;p = new Student; //动态创建下一个对象fscanf(fp,"%ld%s%s",&p->num,p->name,p->subject); //输入下一个对象数据成员的值}pEnd->Next = NULL;return 0;}int Newstudent()//************************增加{FILE *fp;cout << "请输入增加的学生的相关信息: " << endl;cout << "学号: " ;cin >> num ;cout << endl;cout << "姓名: " ;cin >> name;cout << endl;cout << "已选课程设计题目: " ;cin >> subject;cout << endl;if((fp=fopen("student.txt","a"))==NULL){cout << "can not open file!" << endl;exit(0);}fprintf(fp,"%ld %s %s\n",num,name,subject);fclose (fp);return 0;}int Modify()//*****************************修改{FILE *fp;Student *p;char namer[20];Creat();cout << "请输入要修改的姓名:";cin >> namer;cout << endl;if(Head!=NULL){p=Head;while(strcmp(namer,p->name)){p=p->Next;if(p==NULL)break;if(p!=NULL){cout << "你要修改的学生的相关信息如下:" << endl << endl;cout << p->num << ' ' << p->name << ' ' << p->subject << endl << endl;cout << "请输入修改后的相关信息:" << endl << endl;cout << "请输入修改后的学生的学号: ";cin >> p->num;cout << endl;cout << "请输入修改后的姓名: ";cin >> p->name;cout << endl;cout << "请输入修改后的所选题目: ";cin >> p->subject;cout << endl;if((fp=fopen("Student.txt","w"))==NULL){cout << "can not open file!" << endl;exit(0);}p=Head;if(Head!=NULL)do{fprintf(fp,"%ld %s %s\n",p->num,p->name,p->subject);p=p->Next;}while(p!=NULL);fclose (fp);}elsecout << "没有找到你想要修改的题目的信息" <<endl;}elsecout << "文件中还没有任何题目"<<endl;return 0;}int Del()//****************************************删除{FILE *fp;Student *p,*p1;char namer[30];cout << "请输入要删除的学生的姓名:";cin >> namer;cout << endl;if(Head!=NULL){p=Head;while(strcmp(namer,p->name)){p1=p;p=p->Next;if(p==NULL)break;}if(p!=NULL){cout << "你要删除的题目的相关信息如下:" << endl;cout << " 姓名: " << p->name<< endl;cout << " 学号: " << p->num << endl;cout << "所选题目: " << p->subject << endl;system("pause");if(p==Head)Head=p->Next;elsep1->Next=p->Next;if((fp=fopen("Student.txt","w"))==NULL){cout << "can not open file!" << endl;exit(0);}p=Head;if(Head!=NULL)do{fprintf(fp,"%ld %s %s\n",p->num,p->name,p->subject);p=p->Next;}while(p!=NULL);fclose (fp);cout << "该学生的所有信息已被删除!" << endl;}elsecout << "没有找到你想要删除的学生的信息" <<endl;}cout << "文件中还没有任何学生的信息"<<endl;return 0;}};classSubject//*********************************************************************** ****************{int serial_number;//序号char subject[30]; //题目int peoples;//限定人数int people;//已选人数char description[100];//描述Subject *next;Subject *head;public:int Chosesubject();int creat();int newsubject();int modify();int del();int demand();};int Subject::creat(){FILE *fp;head = NULL; //存放链表的起始地址Subject *p, *pEnd;p = new Subject; //创建一个Teacher的动态对象if((fp=fopen("Subject.txt","r"))==NULL){cout << "can not open file!" << endl;exit(0);}fscanf(fp,"%d%s%d%s%d",&p->serial_number,p->subject,&p->peoples,p->description,&p->peo ple); //输入指针p指向的对象的数据成员的值pEnd = head; // 存放当前对象的地址while(!feof(fp)){ // 0 是输入结束的标志if(NULL == head)head = p; // 只在第一次执行此语句elsepEnd->next = p; // 存放下一个对象的地址pEnd = p;p = new Subject; //动态创建下一个对象fscanf(fp,"%d%s%d%s%d",&p->serial_number,p->subject,&p->peoples,p->description,&p->peo ple); //输入下一个对象数据成员的值}pEnd->next = NULL;return 0;}int Subject::newsubject()//************************************增加{FILE *fp;cout << "请输入要增加的题目的序号:";cin >> serial_number;cout << endl;cout << "请输入要增加的题目:";cin >> subject;cout << endl;cout << "请输入要增加的题目的人数限定:";cin >> peoples;cout << endl;cout << "请输入要增加的题目的描述::";cin >> description;cout << endl;cout << "请输入要增加的题目的已选人数:";cin >> people;cout << endl;if((fp=fopen("Subject.txt","a"))==NULL){cout << "can not open file!" << endl;exit(0);}fprintf(fp,"%d %s %d %s %d\n",serial_number,subject,peoples,description,people);return 0;}int Subject::modify()//*****************************修改{FILE *fp;Subject *p;char sub[30];creat();cout << "请输入要修改的题目:";cin >> sub;cout << endl;if(head!=NULL){p=head;while(strcmp(sub,p->subject)){p=p->next;if(p==NULL)break;}if(p!=NULL){cout << "你要修改的题目的相关信息如下:" << endl;cout << p->serial_number << ' ' << p->subject << ' ' << p->people << ' ' << p->description << endl;cout << "请输入修改后的相关信息:" << endl;cout << "请输入修改后的题目的序号:";cin >> p->serial_number;cout << endl;cout << "请输入修改后的题目:";cin >> p->subject;cout << endl;cout << "请输入修改后的题目的人数限定:";cin >> p->peoples;cout << endl;cout << "请输入修改后的题目的描述::";cin >> p->description;cout << endl;cout << "请输入修改后的题目的已选人数:";cin >> p->people;cout << endl;if((fp=fopen("Subject.txt","w"))==NULL){cout << "can not open file!" << endl;exit(0);}p=head;if(head!=NULL)do{fprintf(fp,"%d %s %d %s %d\n",p->serial_number,p->subject,p->peoples,p->description,p->peopl e);p=p->next;}while(p!=NULL);fclose (fp);}elsecout << "没有找到你想要修改的题目的信息" <<endl;}elsecout << "文件中还没有任何题目"<<endl;return 0;}int Subject::del()//****************************************删除{FILE *fp;Subject *p,*p1;char sub[30];creat();cout << "请输入要删除的题目:";cin >> sub;cout << endl;if(head!=NULL){p=head;while(strcmp(sub,p->subject)){p1=p;p=p->next;if(p==NULL)break;}if(p!=NULL){cout << "你要删除的题目的相关信息如下:" << endl;cout << " 序号: " << p->serial_number << endl;cout << " 题目: " << p->subject << endl;cout << "限定人数: " << p->peoples << endl;cout << "题目描述: " << p->description << endl;cout << "已选人数: " << p->people << endl;system("pause");if(p==head)head=p->next;elsep1->next=p->next;if((fp=fopen("Subject.txt","w"))==NULL){cout << "can not open file!" << endl;exit(0);}p=head;if(head!=NULL)do{fprintf(fp,"%d %s %d %s %d\n",p->serial_number,p->subject,p->peoples,p->description,p->peopl e);p=p->next;}while(p!=NULL);fclose (fp);cout << "该题目的所有信息已被删除!" << endl;}elsecout << "没有找到你想要删除的题目的信息" <<endl;}elsecout << "文件中还没有任何题目"<<endl;return 0;}int Subject::demand()//***************************************查询课程设计题目{Subject *p,*p1;char sub[30];creat();cout << "所有题目列表如下" << endl;p=head;while(p != NULL){cout << "序号: " << p->serial_number << "题目: " << p->subject << endl;cout << endl;p = p->next;}cout << " 请输入你想要查看的题目: " ;cin >> sub;cout << endl;if(head!=NULL){p=head;while(strcmp(sub,p->subject)){p1=p;p=p->next;if(p==NULL)break;}if(p!=NULL)cout << "关于该题目有如下描述:"<< endl << p->description << endl;elsecout << "没有找到你想要修改的题目的信息" <<endl;}elsecout << "文件中还没有任何题目"<<endl;return 0;}int Subject::Chosesubject(){FILE *fp;Subject *p,*p1;char sub[30];creat();cout << "请输入你要选择的题目: ";cin >> sub;cout << endl;if(head!=NULL){p=head;while(strcmp(sub,p->subject)){p1=p;p=p->next;if(p==NULL)break;}if(p!=NULL){if(p->people>=p->peoples){cout << "人数超限!你不能再选择此题目!" << endl;exit(0);}Student a;a.Newstudent();p->people++;if((fp=fopen("Subject.txt","w"))==NULL){cout << "can not open file!" << endl;exit(0);}p=head;if(head!=NULL)do{fprintf(fp,"%d %s %d %s %d\n",p->serial_number,p->subject,p->peoples,p->description,p->peopl e);p=p->next;}while(p!=NULL);cout << "****选题成功!***" << endl;fclose (fp);}elsecout << "没有找到你想要修改的题目的信息" <<endl;}elsecout << "文件中还没有任何题目"<<endl;return 0;}int main(){system("color 1d");Subject a;Student b;char choice;cout<<"\n\n\t ★欢迎使用课程设计选课系统★\n\n";cout<<"\t1.★★★★添加新的科目★★★★★★★★★\n";cout<<"\t2.********删除所选内容******************\n";cout<<"\t3.★★★★修改课程设计信息★★★★★★★\n";cout<<"\t4.********添加新的学生的相关信息********\n";cout<<"\t5.★★★★删除学生记录★★★★★★★★★\n\n\n";cout<<"\t6.********修改学生相关信息**************\n";cout<<"\t7.★★★★查询课程设计内容★★★★★★★\n";cout<<"\t8.********进行课程设计选课**************\n";cout<<"\t0.★★★★退出系统★★★★★★★★★★★\n\n\n";cout<<"\t ★***制作人:肖涛***★\n\n\n"; cout<<"\t ★**指导老师:范永全***★\n\n\n"; cout<<"请输入您的选择：";cin>>choice;if(choice=='0')exit(0);elseif(choice=='1'){ a.newsubject();system("pause");main();}else if(choice=='2'){a.del();system("pause");main();}else if(choice=='3'){a.modify();system("pause");main();}else if(choice=='4'){b.Newstudent();system("pause");main();}elseif(choice=='5'){b.Del();system("pause");main();}else if(choice=='6'){b.Modify();system("pause");main();}else if(choice=='7'){a.demand();system("pause");main();}else if(choice=='8'){a.Chosesubject();system("pause");main();}elsecout<<"输入错误，请重新输入您的选择："; system("pause");main();}文章来自: 本站原创。